| This circuit is not really a technical novelty, but it has its practical uses. If, for instance, it is desired to connect a video recorder A...
| This circuit is not really a technical novelty, but it has its practical uses. If, for instance, it is desired to connect a video recorder A...
| INFRA-RED LIGHT SWITCH Anyone who has ever fried to switch the light on when entering a dark room with both hands full will appreciate this...
| 38 elektor electronics december 1985 In a stabilized power supply the dissipation in the stabilizer may become very high when the difference...
| elektor July/august 1985 Microphones, unfortunately, produce onlyasmallsignalandthey,therefore, require a special pre-amplifier to boost the...
| elektor july/august 1985 This temperature regulator can be built without special ICs and may be used with powers up to 3.5 kVA. The circuit...
| electronic VHF/UHF aerial switch There are manyyssitiutuaatitoionnsswwhheerereit iitsis siisttiing of a smalllmaaininsstrtaransnfsofromrmere...
| It is often required to switch an elec- tric light or apparatus from various positions in a building. A typical example of this is the hotel...
| elektor july/august 1985 11g 1111104111041111 If you are one of the many who fre- quently forget to switch off their digital multimeter, thi...
| The special feature of this flashing light is the optical switch, which auto- matically switches the light on when it gets dark, and switche...
| darkness-sensitive light switch elektor march 1985 As can be read almost daily in any newspaper, the number of burglaries in private residen...